Totsuka Maria was praying in a chapel at Seiseki Girls' Academy when a black cross comes falling from the sky. On that cross, was a fallen angel, bearing the sin of pride, Lucifer. Maria attempt to tend to the angel, but the floor falls out and she disappears. Lucifer finds herself in the depths of hell, and runs into the Demon Lord of Envy, Leviathan.
but only the Mortal Sins are allowed 
to enter here. Did you forget?
aber nur die Todsünden dürfen
hier eintreten. Schon vergessen?
pero solo los Pecados Capitales
pueden entrar aquí, ¿recuerdas?
pero solo los Pecados Capitales
pueden entrar aquí, ¿recuerdas?
mais aurais-tu oublié que cet endroit
est réservé aux péchés ?
ma solo i Sette Vizi Capitali possono entrare
in questa stanza, te n'eri scordata?
mas por acaso se esqueceu que só 
os Pecados Capitais podem entrar aqui?
Но входить сюда позволено лишь смертным грехам. 
Не забыла?